Abstract: The invention relates to an aqueous coating agent, obtained from an epoxy resin, ethylenically unsaturated monomers, some of which contain carboxyl groups, a peroxide initiator in a proportion of at least 2% by weight, relative to the total weight of the monomers, a crosslinking agent, a neutralizing agent, organic solvents, and, if appropriate, further conventional additives, such as plasticizers, stabilizers, wetting agents, dispersion auxiliaries, catalysts and pigments.

Abstract: A paint storage vessel is disclosed which is subdivided by flexible insulation into two interior spaces, each connected to its own distribution line and its own paint supply line. The ring main system is connected to the two distribution lines and is effected with the interposition of an electrically insulating change-over mechanism.

Abstract: The invention relates to a cathodically depositable aqueous electropaints which contain cationic amine-modified epoxy resins and are pigmented, with electroconductive carbon black and which, on deposition and crosslinking, provide electrophoroetically overcoatable coatings and contain as electroconductive carbon black a carbon black having an iodine absorption of 870-930 mg/g, a specific surface area (BET/N.sub.2) of 850-1,000 m.sup.2 /g, a pore volume (DBP) of 330-390 ml/100 g and an average particle size of 25-35 nm in an amount of 1.5 to 5.1% by weight--based on total solids.

Abstract: The invention relates to a soluble, cross-linkable acrylate copolymer which is obtainable by copolymerization of more than 3 to 30% by weight of monomers having at least two polymerizable, olefinically unsaturated double bonds, from 5 to 50% by weight of monomers having a cross-linkable group, with the exception of hydroxyl groups and carboxyl groups, and from 20 to 92% by weight of further monomers having a polymerizable, olefinically unsaturated double bond, the sum of the monomers being 100% by weight. The invention furthermore relates to processes for the preparation of acrylate copolymers and coating agents based on the acrylate copolymers according to the invention.

Abstract: The present invention relates to a coating composition containing an organic solvent, a mixture of a polyhydroxy component (A) and a polyisocyanate component (B), and a pot life extender. The polyhydroxy component has an acid value from 5 to 25 mg of KOH/g, and a mixture consisting of 0.1 to 4.0% by weight, based on the total weight of the coating composition, of a compound having a tertiary amino group or an amide group (C), and of 1 to 15% by weight, based on the total weight of (A) and (B), of a tertiary monoalcohol is used as pot life extender. 2-methyl-2-propanol and 2-methyl-2-butanol are excluded as the tertiary alcohols.The present invention also relates to the use of the coating compositions in motor car refinishing in particular.

Abstract: Disazo compounds based on 4,4'-diaminodiphenyl compounds contain not less than 50% by weight of a disazo compound of the general formulaA--N.dbd.N--Z--N.dbd.N--B (I)where Z is a radical of an unsubstituted or symmetrically substituted diphenylene, A is a radical of a coupling component of a 1-phenylpyrazolone or of an acetoacetarylide, where the phenyl and the aryl radical is subtsituted by sulfo or carboxyl groups, and B is a radical of a coupling component based on 1-phenylpyrazolone or acetoacetarylide, which are free of sulfo and/or carboxyl groups.The disazo compounds can be obtained by coupling the tetrazotized diamine H.sub.2 N--Z--NH.sub.2 to the coupling component AH containing an acidic group in a medium containing a mineral acid, and then coupling the product to BH in a buffered medium (pH about 4).The novel disazo compounds are suitable as additives to pigments, in particular azo and disazo pigments, for improving the transparency and heat stability of the pigment particles, and the flow behavior.

Abstract: The invention relates to water-dilutable binders for cationic electrocoating finishes, the said binders containing latent primary amino groups. In order to prepare the binders, an epoxy resin is reacted with a polyamine, which in addition to a sterically hindered primary amino group also contains at least one primary amino group blocked by reaction with a ketone or aldehyde, and, if appropriate, further primary or secondary amines.

Abstract: A synthetic resin which carries basic nitrogen groups and is water-dilutable by protonation with acid is obtainable by reacting(A) an epoxy resin having an average molecular weight M.sub.n of from 200 to 6,000 and on average from 1.5 to 3.0 epoxy groups per molecule with(B) a ketimine of a primary amine additionally containing one or more urethane groups and optionally also with(C) a diketimine of a diprimary amine containing no urethane groups and optionally also with(D) a secondary amine which may contain a tertiary amimo group also, a ketimine of a primary monoamine and/or a ketimine of a primary/tertiary diamine.

Abstract: A process for removing from electrocoating baths impurities which cause surface defects.The invention relates to a process for removing from electrocoating baths impurities which cause surface defects, wherein the electrocoating paint, in addition to the purification operations which are already conventional, is filtered without pressure through an adsorbent which adsorbs hydrophobic substances having a surface tension.ltoreq.35 mN/m--preferably homopolymers or copolymers of ethylene, propylene, but-1-ene or but-2-ene, which, if appropriate, contain further nonpolar comonomers.

Abstract: The invention relates to aqueous electrocoating baths for cathodic paint deposition which contain, as cathodically depositable binders, modified epoxide-amine adducts and are prepared by reacting, in the presence of basic amine catalysts,(1)(A) polyepoxides with(B) compounds which contain, per molecule, one or more, preferably 2, hydroxyl groups bonded to aromatic and/or (cyclo)aliphatic molecular fragments, to form epoxide group-containing intermediates, and(2) by subsequently reacting these intermediates, if appropriate, with further conventional modifiers and finally with(C) primary and/or secondary (poly)amines or their salts and/or salts of tertiary amines, the resultant reaction products being neutralized with acids, if appropriate, dispersed in an aqueous medium and these dispersions further processed by well-known methods to form electrocoating baths.

Abstract: Dispersions of crosslinked polymer micro-particles in aqueous media, a process for the preparation of these dispersions, and coating compositions containing these dispersions.The invention relates to dispersions of crosslinked polymer micro-particles in aqueous media, which have been prepared:(1) by dispersing a mixture of the components (A) and (B) in an aqueous medium, the component (A) being composed of one or more polyester-polyols containing at least 2 hydroxyl groups, and the component (B) being composed of one or more polyisocyanate compounds, and the component (A) having available a number of ionic groups, preferably carboxylate groups, sufficient to form a stable dispersion, and at least one part of the components (A) and/or (B) containing more than 2 hydroxyl or isocyanate, respectively, groups per molecule and(2) by subsequently heating the dispersion thus obtained to a temperature sufficiently high for the components (A) and (B) to react to form crosslinked polymer micro-particles.

Abstract: The invention relates to aqueous two-component lacquers containing pigments and other customary additives for single-layered coating of finish film and continuous edges. The two-component lacquers according to the invention are such lacquers in which the first component (component (A)) contains 0.1 to 15% by weight, preferably 2 to 10% by weight, based on the total weight of component (A), of a blocked acid as a potential hardening catalyst and 10 to 90% by weight, preferably 20 to 65% by weight, based on the total weight of component (A), of an aqueous dispersion of a self-crosslinking polyacrylate, in which the polyacrylate contains, as the groups which facilitate self-crosslinking, acid amide derivative groups which correspond to the general structural formula --CO--N(R.sup.1)--CH(R.sup.2)--OR.sup.3, in which R.sup.1 =an H atom or a --CH(R.sup.2)--OR.sup.3 grouping, R.sup.2 =an H atom or a --COOR.sup.4 group, R.sup.

Abstract: The invention relates to aqueous two-component paints containing customary additives and, if appropriate, pigments, for one-coat coating of finishing sheeting and continuous edging, characterized in that the paints containing as paint component (I)(A) 40 to 85% by weight, preferably 60 to 85% by weight, of an aqueous dispersion of a self-crosslinking polyacrylate resin, which contains as the groups capable of bringing about the self-crosslinking acid amide derivative groups corresponding to the general structural formula--CO--N(R.sup.1)--CH(R.sup.2)--OR.sup.3,whereinR.sup.1 =a hydrogen atom or a --CH(R.sup.2)--OR.sup.3 group,R.sup.2 =a hydrogen atom or a --COOR.sup.4 group,R.sup.3 =a hydrogen atom or a hydrocarbon radical of 1 to 10 carbon atoms, preferably the methyl, ethyl, (iso)propyl or (iso)butyl radical,R.sup.

Abstract: A heat-curable coating material for cathodic electrocoating is water-dilutable on protonation with an acid and contains(A) from 50 to 95% by weight of a polymer, polycondensate or polyadduct containing primary and/or secondary amino groups, as a binder, and(B) from 5 to 50% by weight of a crosslinking agent obtainable by reacting(a) a polyurethane with(b) formaldehyde or a formaldehyde-donating compound and(c) one or more secondary aliphatic amines.

Abstract: Basecoating compositions for preparing multilayered protective and/or decorative coatings comprise aqueous dispersions which contain(a) as film-forming material one or more polyurethane resins having an acid number of from 5 to 70, which has been prepared by preparing from(A) liner polyetherdiols and/or polyesterdiols having a molecular weight of from 400 to 3,000(B) diisocyanates and(C) compounds which contain two groups which are reactive toward isocyanate groups, one or more of the compounds used as component C having one or more groups capable of anion formation which have preferably been neutralized before the reaction with a tertiary amine,an intermediate which as terminal isocyanate groups and whose free isocyanate groups have subsequently been reacted with a polyol which contains three or more hydroxyl groups, preferably a triol,(b) pigments and(c) further customary additives.

Abstract: Disazo compounds based on 4,4'-diaminodiphenyl compounds contain not less than 50% by weight of a disazo compound of the general formulaA--N.dbd.N--Z--N.dbd.N--B (I)where Z is a radical of an unsubstituted of symmetrically substituted diphenylene, A is a radical of a coupling component of a 1-phenylpyrazolone or of an acetoacetarylide, where the phenyl and the aryl radical is substituted by sulfo or carboxyl groups, and B is a radical of a coupling component based on 1-phenylpyrazolone or acetoacetarylide, which are free of sulfo and/or carboxyl groups.The disazo compounds can be obtained by coupling the tetrazotized diamine H.sub.2 N--Z--NH.sub.2 to the coupling component AH containing an acidic group in a medium containing a mineral acid, and then coupling the product to BH in a buffered medium (pH about 4).The novel disazo compounds are suitable as additives to pigments, in particular azo and disazo pigments, for improving the transparency and heat stability of the pigment particles, and the flow behavior.

Abstract: The invention relates to a soluble acrylate copolymer which can be obtained by copolymerization of more than 3 to 30% by weight, based on the total weight of all the monomers, of a monomer with at least 2 polymerizable, olefinically unsaturated double bonds, monomers which carry functional groups and other monomers with a polymerizable double bond, the acid number of the acrylate resin being 15 to 200. The invention furthermore relates to processes for the preparation of the acrylate copolymers and coatings based thereon and based on polyepoxides.

Abstract: The invention relates to cathodically depositable aqueous electropaints which contain cationic amine-modified epoxy resins and are pigmented with electroconductive carbon black and which, on deposition and crosslinking, provide electrophoretically overcoatable coatings and contain as electroconductive carbon black a carbon black having an iodine absorption of 870-930 mg/g, a specific surface area (BET/N.sub.2) of 850-1,000 m.sup.2 /g, a pore volume (DBP) of 330-390 ml/100 g and an average particle size of 25-35 nm in an amount of 1.5 to 5.1% by weight - based on total solids.

Abstract: A binder which is water-dilutable on protonation with acid and obtainable by a reaction of(A) an epoxy resin having an average molecular weight of from 300 to 6,000 and on average from 1.5 to 3.0 epoxide groups per molecule and(B) from 20 to 30 mol %, based on the amount of epoxide groups present in epoxy resin (A), of one or more secondary amine and/or alkanolamine of up to 40 carbon atomsand subsequent reaction with(C) a copolymer which is based on butadiene and acrylonitrile and contains primary and/or secondary amino groups, the amount of (C) being so dimensioned that the number of primary and secondary amino groups corresponds to from 1 to 50 mol % of the epoxide groups present in the epoxy resin (A), and also(D) with one or more primary and/or secondary amine to convert any epoxide groups still present, is usedin particular for cathodic electrocoating.

Abstract: Soluble acrylate copolymer containing carboxyl groups, processes for its preparation and coating agents based on the acrylate copolymer.The invention relates to a a soluble acrylate copolymer which can be obtained by copolymerization of more than 3 to 30% by weight, based on the total weight of all the monomers, of a monomer with at least 2 polymerizable, olefinically unsaturated double bonds, monomers which carry functional groups and other monomers with a polymerizable double bond, the acid number of the acrylate resin being 15 to 200. The invention furthermore relates to processes for the preparation of the acrylate copolymers and coatings based thereon and based on polyepoxides.